Joseph flint



' shown in tig. 2.

des."

@or Y.. "tra at wir ital i what JosEPHrLiN-T, or `ROCHE STE R, NEW YORK.

` Letters Patent No. 85,081, dated December 22, 1868. l i

'IMPROVE:rimer;` IN GRINDING-MACHINES The Schedule referred to in these Letters Patent and ,making of the same.

To all whom it may concern.: Be it known that I, JOSEPH Fiiiu'r, of the city of Rochester, in the State of New York, have invented a new and useful Saw-Grinding Machine; and Ido hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawing, making part of this` sl'ieciiioation, in which-m Figine 1 is a longitudinal section.

Figure 2 is a front elevationof the journal-boxes o'f the front feed-rollers, and cog-wheels on the shaft of the rollers..

Figure 3 is a front elevation ofthe join'nal-boxes of therear feed-rollers, aiid'cog-wheels on the rshaft of the'rollers, showing also the end of the shaft of the return-roller.

The nature of my invention will be understood from the drawings and specifications.

To enable others skilled in the art to ina-ke and use my invention, I will describe its 'construction and-operation.

' On the lower pait of a suitable frame, A, I place a shaft, B, which carries a grinding-stone, C.

0n the inside ofthe fraine A, a veitically-moying frame, B', is placed, which is sustained by guides, j, on the four posts D, ibuning the frame A and it is held together by clamping-bolts i v This frame is eai'riedby the regulating-screws E, which are attached, one to each side of the frame A.

Either side ofthe fraine B' may be adjusted by the screws E, so that one will be lower thanthe other, when it is desired to grind the saw-plate thinner on one edge. Y v v On the screws E, a hand-wheel, A, is keyed, to operate them; or, gear-wheels may be placed on the screw-shafts, instead of the l'iaiid-wlieel, which mesh into pinions on shafts ruiming tothe end of the frame A, shown in dotted lines C2, l, for the same puil pose.

Inside of both ends of the franie B', and in front and rear of the grindstone 0,11 place two rollers, F and l1", of equal size, for. the purpose of feeding and carrying the saw over the top of the stone.

The ends ofthe shafts of the rollers I*` extend through the frame B', on one side, and the front roller, l1, has two pulleys on it, as shown in dotted lines, tig. l.-

One of these pulleys is connected to a shaft hy a belt, which gives it motion; the rother to a pulley on the shaft of the rear roller, F", by a belt, shown in dotted lilies, H, iig. 1, which"v ives it inet-ion.

'llie journals ofthe rollers and l!" are all litted in boxes that have rubber or other springs, that -allow' rhein to yield, if any unevi-enness occurs in the sawplate.

0n the ends of the :11", opposite to l place (cog-wheels, n, which niesh into each other, :i's

shafts ofthe front rollers, F and the )jiulleys shown iii dotted lilies, tig. l,l

I also provide the rear rollers, F and Fl, with like cog-wheels, b, which mesh into each other, iig. 3.

All the oog-wheels, a, and l), having the same diameter, give a uniform inotion to the rollers F and Fl.

On top of the rear rollers, and linside of the frame B', Iplace a roller, Gr, the journals of which are'tted iu boxes, held together by springs.

lhsroller is larger than the roller F, sc that, a rubber packing being placed between the journalboxes of these rollers, they will come close together.

Inside of the frame B', and immediately over the grinding-stone C, I place a wood cross-bar, H2, having 'fitted in its under face a hardened piece of metahvJ, to prevent wear by Atli'e `saw as it passes through.

' The cross-bar H' is intended to press the saw down on the grinding-stone.

Between the grinding-stone Gand the rear rollers,

l!" and F, I placea stationary guiding-platform, c, thev top of which alittle. below the top of the stone, so that the saw will pass over it, into the rear rollers, F and Fl. f

I place over the guiding-platform o a covering-board, c, at a suitable distance. to allow for the thickness of the saw-plate.

The cover-board e serves to guide the plate into the rollers F and F', and it` also-prevents the saw from kinking or doubling up by the extra speed of the grindii'ig-stone, Vwhich forces 'it faster than the rollers F and Fl are required totaleit through. 'On the rear endof th frame A,

I fasten a platform,

F3, slightly below the top of the roller Fl; anda part of the plaforin is bent downward, until the surface is in a direct line with a point between the rollers Fand G.

The.inclined part of the platform has a sl/ot, y, extending ldown to the lower end.

On the inclined portion of the platform, I have a slide, L, that isinoved up by a rope, o, fastened to the upper end f theslot y, Y Y `f This-'rope o runs over 'a pulley, I?, inthe outer end'v of the slide L, and, over the top of the frame, to the operator. Y The slide L is carried down by the saw-plate as it eoines out from the rear rollers F and F. y

'The object of my invention is to produce a machine tl'iat will grindI saws incre evenly and quickly than can lie'done by the present means. -Its operation is as follows :v

rIlie grinding-stone being set in motion `bya belt leading to a pulley on the shaft which carries the stone, the operator places the saw-plate between. the o'nt rollers, F and F, which, being set in motion, carry the saw between the grinding-stone G and cross-bar H2, and, between the guiding-platform o and cover e, to the rear rollers, F and F1. The front and rear rollers,

' F and F1, runat a less speed than the periphery of the grinding-stone C. Consequently the front rollers, F and F, have to clasp and move the saw-plate gradually over the stone, so that it will be ground; otherwise the stelle Will carry the sauv'too fast, and not grind it. The rear rollers, F amd F, perform the sinne functions Lifter the saw-plate reaches them, and also guide it along until the outer end of the sew reaches the slide L,

which moves down the inclined part of the platform until the saw is clear of the rollers. The inner end of the saw-plate then springs up in :t direct line with a point between the rollers G and F, as shown by dotted lines, iig. l.

The operator, by pulling on the rope o, draws the slide L towards' the rollers, and enters the sew-plate between the rollers G and F, and they carry it back to him.

If it is desired to grind the saw thinner on one edge, one side of the frame B is forced down by the screw E, which presses that side of the saw-plate harder on the stone, V2mdmakes it' thinner after it is passed through.

VVhet l claim as my invention, :md desire to secure byA LettersI Patent, i.`

l. The feed-rol1ers F and F', cross-ber H2, in coinhiniition with the grinding-stone C, for the purpose herein shown and described,

2. The vertically-movable tiznne B", in combination with the grinding-stone C, as :md for the purpose herein ,set forth.

. 3. The-mrangement of the platform F3, slide L, and rope 0, in combination with the rollers G and F, for the purpose of returning the saw to the operator, subst'zintially :is herein shown and described,

JOSEPH FLINT.

fitnesses J. O. DIETRIUH, JAs. LORENZO GAGE. 

